1688036 has 36 divisors (see below), whose sum is σ = 3584448. Its totient is φ = 681264.

The previous prime is 1687999. The next prime is 1688041. The reversal of 1688036 is 6308861.

It is a junction number, because it is equal to n+sod(n) for n = 1687993 and 1688011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10025 + ... + 10191.

It is an arithmetic number, because the mean of its divisors is an integer number (99568).

2^1688036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1688036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792224).

1688036 is an abundant number, since it is smaller than the sum of its proper divisors (1896412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1688036 is a wasteful number, since it uses less digits than its factorization.

1688036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1688036 is about 1299.2443957932. The cubic root of 1688036 is about 119.0676827035.

The spelling of 1688036 in words is "one million, six hundred eighty-eight thousand, thirty-six".